all of (something)

1. The entirety of something. Boy, cleaning the kitchen just zapped all of my energy—I need to lie down! Please tell me you didn't blow all of your money on this clearly fake bag. I want a traditional wedding, with the cake, the dress—all of it.

2. Just; only. Luckily, that phone call took all of five minutes, so I wasn't late to the meeting after all. I'm so impressed that Jessica found the files in all of two minutes. She really knows my office better than I do! With the right equipment, I could patch that leak in all of 20 minutes

3. At least. Don't be fooled by his baby face—he's all of 30 years old. I just don't understand why a college student is interested in a professor who's all of 50. Why he is still living with his parents when he's clearly all of 40 years old?

all of something

(of size, weight, distance, etc.) at least: ‘How old is she?’ ‘Oh, she must be all of fifty.’ ♢ (ironic) He never visits his mother and she lives all of three miles away.